John was piloting a plane behind a car but was never able to overtake it. Why?

Can you count the number of matches in the picture below ?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

Solve the rebus riddle in the picture below.

It is a six-letter word.
The first four letters are me.
The second and last letters are the same.
The fourth second and last letter is payment.

Who is it?

Spot 5 differences in two Christmas tree below:

Why do people go to bed?